Generation and tuning of high-order harmonic radiation for x-ray-laser seeding using the Phelix shortpulse-frontend

oped a good expertise in the Ni in incidence pumping (DGRIP) scheme the beam quality and the spatial coherence as well as the pointing stability of plasma has been successfully demonstrated by using high harmonic (HH) radiation for injection for spectroscopy of heavy ions in the experimental st rage ring (ESR) and in the upcoming storage ring at FAIR (NESR) will bene XRL. A successful seeding process demands others a perfect spectral match between the XRL lasing transition and the seed harmonic. The pump dent HH wavelength can be tuned by controlling the process of high harmonic generation in the gas medi laser wavelength is fixed, as it is the case for the Phelix Nd:glass laser system. long laser pulses into a nickel tube which was connected to a pulsed gas valve delivering ms pulses. The nonlinear interaction of the intense laser pulses with intensities of lead to high harmonic emission in the soft x